>>> On 29.08.16 at 01:14, <ha...@alstadheim.priv.no> wrote:
First of all - please don't cross post.
> Den 17. aug. 2016 21:56, I wrote (to xen-users, as I am no developer):
>> I'm on gentoo, running gentoo-sources kernel for dom0.
>>
>> I am unable to run gentoo-sources-4.7.{0,1}. I'm running under xen,
>> currently at 4.6.3-r1
>
> I am now on linux gentoo-sources-4.7.2, and the bug is stil present.
>
> I have done some digging on my own, and found that protecting two instances
> of " for_each_efi_memory_desc(md) {" with something like "if( efi.memmap.map
> != NULL) {" will allow my dom0 to boot and run.
Which is basically the equivalent of e.g.
http://lkml.iu.edu/hypermail/linux/kernel/1608.2/03448.html
(this first one that a quick search found)
> My line-numbers may be a bit off due to copious use of pr_info.
>
> The locations are:
> - linux/arch/x86/platform/efi/efi.c line 121 in function efi_find_mirror()
> - /usr/src/linux/arch/x86/platform/efi/quirks.c line 253 in function
> efi_free_boot_services(void)
>
> Searching the web lead me first to a solution which I believe to be
> wrong, changing the comparison operator in for_each_efi_memory_desc. It
> also lead me to someone mentioning that efi.memmap.map is not used when
> running under xen. That info may also be bogus for all I know.
Not sure which part the "bogus" here is meant to apply to: Do you
mean the statement is bogus (in which case I wonder why), or do
you mean the data pointed to would be bogus (in which case I
wonder what data you think about when the pointer is NULL)?
Jan
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